CN209844871U - Automatic water supply control circuit for water tank with fixed water level - Google Patents
Automatic water supply control circuit for water tank with fixed water level Download PDFInfo
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- CN209844871U CN209844871U CN201921015456.XU CN201921015456U CN209844871U CN 209844871 U CN209844871 U CN 209844871U CN 201921015456 U CN201921015456 U CN 201921015456U CN 209844871 U CN209844871 U CN 209844871U
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Abstract
The utility model discloses an automatic control circuit that supplies water of water tank constant water level, including transformer T1, rectification output circuit, first signal rectifier circuit, second signal rectifier circuit, each lead terminal, first operational circuit, second operational circuit, trigger control circuit, motor drive circuit, transformer T1 connects the 220V power, rectification output circuit, lead terminal B, lead terminal O, lead terminal A and lead terminal B connect first signal rectifier circuit respectively, lead terminal C and lead terminal O connect second signal rectifier circuit respectively, first signal rectifier circuit connects first operational circuit, second signal rectifier circuit connects second operational circuit, trigger control circuit is connected simultaneously to first operational circuit and second operational circuit, trigger control circuit connects motor drive circuit. The utility model discloses detect sensitively, low to the degree of dependence that detects hardware, the probability that effectively reduces the occurence of failure and motor can not frequent start.
Description
Technical Field
The utility model relates to a control circuit especially relates to an automatic water supply control circuit of water tank constant water level.
Background
The water supply control device for the water tank mainly comprises two water supply control devices, wherein one water supply control device is mainly controlled by a floating ball connecting rod controlled by a constant water level, namely, as long as water is discharged, water is supplied immediately, and a water pump motor is started frequently. In the other type, although the water level is controlled to be constant, that is, the water level is lowered to a constant position, and then the water is continuously supplied to a constant height, and then the water supply is stopped, since the water level detection is a mechanical detection in many cases, the detection result is insensitive, and the mechanical detection device has a high damage rate with the passage of time, and thus water overflow or water non-supply is easily caused. It is desirable to provide improvements.
Disclosure of Invention
The utility model discloses to the current detection device testing result that exists among the prior art insensitive and detection device defect such as damage easily, provide a new automatic water supply control circuit of water tank constant water level.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
an automatic water supply control circuit for a water tank with a fixed water level comprises a transformer T1, a rectification output circuit, a first signal rectification circuit, a second signal rectification circuit, a lead terminal A, a lead terminal B, a lead terminal C, a lead terminal O, a first arithmetic circuit, a second arithmetic circuit, a trigger control circuit and a motor drive circuit, wherein an inductor P1 of a transformer T1 is connected with a 220V power supply, an inductor P2 of a transformer T1 is connected with the rectification output circuit, an inductor P3 of a transformer T1 is respectively connected with the lead terminal B and the lead terminal O, the lead terminal A and the lead terminal B are respectively connected with the first signal rectification circuit, the lead terminal C and the lead terminal O are respectively connected with the second signal rectification circuit, the first signal rectification circuit is connected with the first arithmetic circuit, the second signal rectification circuit is connected with the second arithmetic circuit, the first operational circuit and the second operational circuit are simultaneously connected with the trigger control circuit, and the trigger control circuit is connected with the motor driving circuit.
Transformer T1 passes through rectification output circuit and inductor P1, P2, P3 does the utility model provides a voltage and electric current relatively stable's power, first signal rectifier circuit, lead terminal A is connected respectively to second signal rectifier circuit, lead terminal B, lead terminal C, lead terminal O, carry out the rectification and convert the alternating current to one-way pulsatility direct current to each lead terminal signal, first arithmetic circuit, second arithmetic circuit can be with first signal rectifier circuit, the signal that second signal rectifier circuit transmitted comes is calculated the back and is conveyed to trigger control circuit, trigger control circuit can start or stop according to the signal control motor drive circuit who accepts. The utility model discloses utilize opening of circuit control water tank water pump motor to stop, more sensitive to the detection of water level, reduced the reliance to detecting hardware, effectively reduce the probability of occurence of failure and the motor can not frequent start.
Preferably, the first operational circuit comprises an operational amplifier U1, a resistor R1, a resistor R2, a resistor R8, a diode Q1, and a diode Q2, wherein a pin 1 of the operational amplifier U1 is connected to the trigger control circuit through the resistor R8, a pin 3 of the operational amplifier U1 is connected to the first signal rectification circuit, a cathode of the diode Q2 is connected to the power VCC, an anode of the diode Q2 is connected to the pin 3 of the operational amplifier U1, a cathode of the diode Q1 is connected to the pin 3 of the operational amplifier U1, an anode of the diode Q1 is grounded, two ends of the resistor R2 are connected to the power VCC and a pin 2 of the operational amplifier U1, and two ends of the resistor R1 are connected to the pin 3 of the operational amplifier U1 and the ground.
The operational amplifier U1 is an integrated chip of type LM358, and outputs an amplified signal through the 1 pin of the operational amplifier U1 after the 2 pin inverted signal input of the operational amplifier U1 and the 3 pin non-inverted signal input of the amplifier U1.
Preferably, the second operational circuit of the automatic water supply control circuit for constant water level of the water tank comprises an operational amplifier U2, a resistor R3, a resistor R4 and a resistor R5, the resistor R9, the diode Q3 and the diode Q4 are connected, the pin 7 of the operational amplifier U2 is connected with the trigger control circuit through the resistor R9, the pin 4 of the operational amplifier U2 is grounded, the pin 8 of the operational amplifier U2 is connected with the power VCC, the pin 5 of the operational amplifier U2 is connected with the second signal rectification circuit, the cathode end of the diode Q3 is connected with the pin 8 of the operational amplifier U2, the anode end of the diode Q3 is connected with the pin 5 of the operational amplifier U2, the cathode end of the diode Q4 is connected with the pin 5 of the operational amplifier U2, the anode end of the diode Q4 is grounded, the two ends of the serially connected resistor R3 and the resistor R4 are respectively connected with the pin 6 and the pin 8 of the operational amplifier U2, and the two ends of the resistor R5 are respectively connected with the.
The operational amplifier U2 is an integrated chip of type LM358, and outputs an amplified signal through the pin 7 of the operational amplifier U2 after the inverted signal input of the pin 6 of the operational amplifier U2 and the non-inverted signal input of the pin 5 of the operational amplifier U2.
Preferably, the trigger control circuit comprises a trigger U3, a capacitor C1, a capacitor C2, a capacitor C3 and a resistor R10, wherein pin 3 of the trigger U3 is connected to the motor driving circuit through the resistor R10, pin 2 of the trigger U3 is connected to the first arithmetic circuit and the second arithmetic circuit, pin 4 and pin 8 of the trigger U3 are connected to the power VCC at the same time, pin 5 of the trigger U3 is connected to the ground through the capacitor C3, pin 1 of the trigger U3 is connected to the ground, and two ends of the capacitor C1 and the capacitor C2 are connected to pin 6 and pin 1 of the trigger U3 respectively.
The trigger U3 is an integrated chip with the model of NE555, the first operational circuit and the second operational circuit are connected to the pin 2 of the trigger U3, the action is started when the voltage of the pin 2 is shifted from the lower voltage of 1/3VCC to the upper voltage of 2/3VCC, and the signal is output through the pin 3 of the trigger U3, so that the starting and stopping of the motor driving circuit are controlled.
Preferably, the first signal rectification circuit comprises a rectifier DO1, a thermistor RT1, a resistor R6, a resistor R11 and a capacitor C4, wherein pin 1 of the rectifier DO1 is connected with the lead terminal a, pin 3 of the rectifier DO1 is connected with the lead terminal B, pin 2 of the rectifier DO1 is connected with the first arithmetic circuit through the resistor R11, pin 4 of the rectifier DO1 is grounded, two ends of the thermistor RT1 are respectively connected with pin 1 and pin 3 of the rectifier DO1, and two ends of the resistor R6 and the capacitor C4 are respectively connected with pin 2 and pin 4 of the rectifier DO 1.
The first signal rectification circuit is respectively connected with the lead terminal A, the lead terminal B and the first operational circuit, and rectifies and transmits signals of the lead terminal A and the lead terminal B to the first operational circuit, so that the signals are transmitted more stably.
Preferably, the second signal rectification circuit comprises a rectifier DO2, a thermistor RT2, a resistor R7, a resistor R12 and a capacitor C5, wherein pin 1 of the rectifier DO2 is connected with the lead terminal C, pin 3 of the rectifier DO2 is connected with the lead terminal O, pin 2 of the rectifier DO2 is connected with the second arithmetic circuit through the resistor R12, pin 4 of the rectifier DO2 is grounded, two ends of the thermistor RT2 are respectively connected with pin 1 and pin 3 of the rectifier DO2, and two ends of the resistor R7 and the capacitor C5 are respectively connected with pin 2 and pin 4 of the rectifier DO 2.
The second signal rectification circuit is respectively connected with the lead terminal C, the lead terminal O and the second operational circuit, and rectifies signals of the lead terminal C and the lead terminal O and transmits the rectified signals to the first operational circuit, so that the signals are transmitted more stably.
Preferably, the automatic water supply control circuit for water tank with fixed water level comprises a triode Q6, a diode Q5 and a motor J, wherein two ends of the motor J are respectively connected with a power supply VDD and a collector of the triode Q6, the diode Q5 is connected with the motor J in parallel, a base of the triode Q6 is connected with the trigger control circuit, and an emitter of the triode Q6 is grounded.
The motor driving circuit can start and stop the motor J according to the signal sent by the trigger control circuit, so that the water level is controlled.
Preferably, in the above automatic water supply control circuit for water tank with fixed water level, the lead terminal a corresponds to a lowest water level signal, the lead terminal B corresponds to a next-lowest water level signal, and the lead terminal C corresponds to a high water level signal.
Set up the lead terminal and correspond high, low, inferior low water level respectively, make the utility model discloses it is more nimble at the in-process of control water level.
Drawings
Fig. 1 is a schematic circuit diagram of a transformer T1 and a rectification output circuit in the present invention;
fig. 2 is the circuit structure schematic diagram of the middle first signal rectification circuit, the second signal rectification circuit, the first operational circuit, the second operational circuit, the trigger control circuit and the motor driving circuit of the utility model.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings 1-2 and the detailed description, which are not intended to limit the invention:
example 1
An automatic water supply control circuit for a water tank with a fixed water level comprises a transformer T1, a rectification output circuit 1, a first signal rectification circuit 2, a second signal rectification circuit 3, a lead terminal A, a lead terminal B, a lead terminal C, a lead terminal O, a first arithmetic circuit 4, a second arithmetic circuit 5, a trigger control circuit 6 and a motor drive circuit 7, wherein an inductor P1 of a transformer T1 is connected with a 220V power supply, an inductor P2 of the transformer T1 is connected with the rectification output circuit 1, an inductor P3 of the transformer T1 is respectively connected with the lead terminal B and the lead terminal O, the lead terminal A and the lead terminal B are respectively connected with the first signal rectification circuit 2, the lead terminal C and the lead terminal O are respectively connected with the second signal rectification circuit 3, and the first signal rectification circuit 2 is connected with the first arithmetic circuit 4, the second signal rectification circuit 3 is connected with the second operational circuit 5, the first operational circuit 4 and the second operational circuit 5 are simultaneously connected with the trigger control circuit 6, and the trigger control circuit 6 is connected with the motor driving circuit 7.
When the water level controller works, a 220V power supply is connected with a transformer T1 and then outputs low voltage to the first signal rectification circuit 2 and the second signal rectification circuit 3 through an inductor P3 of the transformer T1, the first signal rectification circuit 2 and the second signal rectification circuit 3 rectify the low voltage to output direct current and simultaneously output signals of each lead terminal to the first arithmetic circuit 4 and the second arithmetic circuit 5, the first arithmetic circuit 4 and the second arithmetic circuit 5 transmit the calculated signals to the trigger control circuit 6, and the trigger control circuit 6 controls the start and stop of the motor driving circuit 7 according to the input signals, so that the water level is controlled.
Preferably, the first operational circuit 4 includes an operational amplifier U1, a resistor R1, a resistor R2, a resistor R8, a diode Q1, and a diode Q2, wherein a pin 1 of the operational amplifier U1 is connected to the trigger control circuit 6 through the resistor R8, a pin 3 of the operational amplifier U1 is connected to the first signal rectifying circuit 2, a cathode of the diode Q2 is connected to the power VCC, an anode of the diode Q2 is connected to a pin 3 of the operational amplifier U1, a cathode of the diode Q1 is connected to a pin 3 of the operational amplifier U1, an anode of the diode Q1 is grounded, two ends of the resistor R2 are connected to the power VCC and a pin 2 of the operational amplifier U1, and two ends of the resistor R1 are connected to a pin 3 of the operational amplifier U1 and a ground.
Preferably, the second operational circuit 5 includes an operational amplifier U2, a resistor R3, a resistor R4, a resistor R5, a resistor R9, a diode Q3, and a diode Q4, wherein a pin 7 of the operational amplifier U2 is connected to the trigger control circuit 6 through the resistor R9, a pin 4 of the operational amplifier U2 is grounded, a pin 8 of the operational amplifier U2 is connected to the power VCC, a pin 5 of the operational amplifier U2 is connected to the second signal rectifying circuit 3, a pin 8 of the operational amplifier U2 is connected to a cathode terminal of the diode Q3, a pin 5 of the operational amplifier U2 is connected to an anode terminal of the diode Q3, a pin 5 of the operational amplifier U2 is connected to a cathode terminal of the diode Q4 is grounded, two ends of the resistor R3 and the resistor R4 which are connected in series are respectively connected to a pin 6 and a pin 8 of the operational amplifier U2, and two ends of the resistor R5 are respectively connected to a pin 6 and a pin 4 of.
Preferably, the trigger control circuit 6 includes a flip-flop U3, a capacitor C1, a capacitor C2, a capacitor C3, and a resistor R10, wherein pin 3 of the flip-flop U3 is connected to the motor drive circuit 7 through the resistor R10, pin 2 of the flip-flop U3 is connected to the first arithmetic circuit 4 and the second arithmetic circuit 5, pin 4 and pin 8 of the flip-flop U3 are simultaneously connected to the power source VCC, pin 5 of the flip-flop U3 is connected to the ground through the capacitor C3, pin 1 of the flip-flop U3 is connected to the ground, and both ends of the capacitor C1 and the capacitor C2 are connected to pin 6 and pin 1 of the flip-flop U3.
Preferably, the first signal rectifying circuit 2 includes a rectifier DO1, a thermistor RT1, a resistor R6, a resistor R11 and a capacitor C4, wherein a pin 1 of the rectifier DO1 is connected to the lead terminal a, a pin 3 of the rectifier DO1 is connected to the lead terminal B, a pin 2 of the rectifier DO1 is connected to the first arithmetic circuit 4 through the resistor R11, a pin 4 of the rectifier DO1 is grounded, two ends of the thermistor RT1 are respectively connected to a pin 1 and a pin 3 of the rectifier DO1, and two ends of the resistor R6 and the capacitor C4 are respectively connected to a pin 2 and a pin 4 of the rectifier DO 1.
Preferably, the second signal rectifying circuit 3 includes a rectifier DO2, a thermistor RT2, a resistor R7, a resistor R12 and a capacitor C5, wherein a pin 1 of the rectifier DO2 is connected to the lead terminal C, a pin 3 of the rectifier DO2 is connected to the lead terminal O, a pin 2 of the rectifier DO2 is connected to the second arithmetic circuit 5 through the resistor R12, a pin 4 of the rectifier DO2 is grounded, two ends of the thermistor RT2 are respectively connected to a pin 1 and a pin 3 of the rectifier DO2, and two ends of the resistor R7 and the capacitor C5 are respectively connected to a pin 2 and a pin 4 of the rectifier DO 2.
Preferably, the motor driving circuit 7 includes a transistor Q6, a diode Q5, and a motor J, both ends of the motor J are respectively connected to a power supply VDD and a collector of a transistor Q6, the diode Q5 is connected in parallel with the motor J, a base of the transistor Q6 is connected to the trigger control circuit 6, and an emitter of the transistor Q6 is grounded.
Preferably, the lead terminal A corresponds to a lowest water level signal, the lead terminal B corresponds to a next-lowest water level signal, and the lead terminal C corresponds to a high water level signal.
When the transformer T1 is in operation, the 220V power supply is connected with the transformer T1, and then outputs low voltage to the first signal rectification circuit 2 and the second signal rectification circuit 3 through the inductor P3 of the transformer T1. The first signal rectifying circuit 2 and the second signal rectifying circuit 3 rectify low voltage electricity to output direct current through the rectifier DO1 and the rectifier DO2 and output signals of lead terminals to the first operational circuit 4 and the second operational circuit 5, wherein the first operational circuit 4 outputs signals through the pin 2 reverse phase signal input of the operational amplifier U1 and the pin 3 non-phase signal input of the amplifier U1 and then through the pin 1 of the amplifier U1. In the second operational circuit 5, a 6-pin inverted signal input of the operational amplifier U2 and a 5-pin non-inverted signal input of the operational amplifier U2 are inputted, and then a signal is outputted through a 7-pin operational amplifier U2. The first and second arithmetic circuits 4 and 5 transmit the signals after arithmetic amplification to the trigger control circuit 6. Wherein, the lead terminal A corresponds to a lowest water level signal, the lead terminal B corresponds to a next-lower water level signal, and the lead terminal C corresponds to a higher water level signal.
When the water level is lower than the low water level, the lead terminal A and the lead terminal C are in a low level state, at the moment, the pin 1 of the operational amplifier U1 and the pin 7 of the operational amplifier U2 output low levels, the pin 2 and the pin 6 of the trigger U3 are in low levels, the pin 3 of the trigger U3 outputs high levels, the triode Q6 is conducted, and the motor J operates and enters water.
When the water level crosses the low water level to reach the high water level, the lead terminal A is always in a high level state, the lead terminal C is in a low level state, the voltage of the pin 2 of the trigger U3 is 5V, the voltage is smaller than 2/3VCC, the trigger U3 does not overturn, the pin 3 of the trigger U3 outputs high level, and the motor J keeps running and enters water.
When the water level reaches a high water level, the lead terminal A and the lead terminal C are in a high level state, the voltage of a pin 2 of the trigger U3 is 10V, the voltage is greater than 2/3VCC, the trigger U3 overturns, a pin 3 of the trigger U3 outputs a low level, the triode Q6 is not conducted, and the motor J stops running.
Before the water level is reduced to the next low water level from the high water level, the lead terminal A is in a high level state, the lead terminal C is in a low level state, the voltage of a pin 6 of the trigger U3 is 5V, the voltage is greater than 1/3VCC, the trigger U3 does not overturn, a pin 3 of the trigger U3 outputs low level, the triode Q6 is not conducted, and the motor J keeps a stop state.
When the water level continues to be reduced to the lowest water level, the lead terminal A and the lead terminal C are in a low level state, the voltage of the pin 6 of the trigger U3 is 0V, the voltage is smaller than 1/3VCC, the trigger U3 overturns, the pin 3 of the trigger U3 outputs high level, the triode Q6 is conducted, and the motor J starts to operate and enters water.
The water level control process of the utility model is completed by such circulation.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides an automatic water supply control circuit of water tank constant water level, includes transformer T1, rectification output circuit (1), first signal rectifier circuit (2), second signal rectifier circuit (3), its characterized in that: still include lead terminal A, lead terminal B, lead terminal C, lead terminal O, first arithmetic circuit (4), second arithmetic circuit (5), trigger control circuit (6), motor drive circuit (7), 220V power is connected to transformer T1's inductor P1, and transformer T1's inductor P2 is connected rectification output circuit (1), and transformer T1's inductor P3 is connected respectively lead terminal B with lead terminal O, lead terminal A with lead terminal B connects respectively first signal rectifier circuit (2), lead terminal C with lead terminal O connects respectively second signal rectifier circuit (3), first signal rectifier circuit (2) are connected first arithmetic circuit (4), second signal rectifier circuit (3) are connected second arithmetic circuit (5), first arithmetic circuit (4) and second arithmetic circuit (5) are connected simultaneously trigger control electric control circuit (5) And the trigger control circuit (6) is connected with the motor driving circuit (7).
2. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: first operational circuit (4) are including operational amplifier U1, resistance R1, resistance R2, resistance R8, diode Q1, diode Q2, and 1 foot of operational amplifier U1 passes through resistance R8 connects trigger control circuit (6), and 3 feet of operational amplifier U1 are connected first signal rectifier circuit (2), and power VCC is connected to diode Q2 cathode terminal, and 3 feet of operational amplifier U1 are connected to diode Q2 anode terminal, and 3 feet of operational amplifier U1 are connected to diode Q1 cathode terminal, and diode Q1 anode terminal ground, and power VCC and operational amplifier U1's 2 feet are connected respectively to the both ends of resistance R2, and 3 feet and ground of operational amplifier U1 are connected respectively to the both ends of resistance R1.
3. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the second operational circuit (5) comprises an operational amplifier U2, a resistor R3, a resistor R4, a resistor R5, a resistor R9, a diode Q3 and a diode Q4, wherein a pin 7 of the operational amplifier U2 is connected with the trigger control circuit (6) through the resistor R9, a pin 4 of the operational amplifier U2 is grounded, a pin 8 of the operational amplifier U2 is connected with a power VCC, a pin 5 of the operational amplifier U2 is connected with the second signal rectifying circuit (3), a cathode end of the diode Q3 is connected with a pin 8 of the operational amplifier U2, an anode end of the diode Q3 is connected with a pin 5 of the operational amplifier U2, a cathode end of the diode Q24 is connected with a pin 5 of the operational amplifier U2, an anode end of the diode Q4 is grounded, two ends of the resistor R3 and the resistor R4 after being connected in series are respectively connected with a pin 6 and a pin 8 of the operational amplifier U2, and two ends of the resistor R5 are respectively.
4. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the trigger control circuit (6) comprises a trigger U3, a capacitor C1, a capacitor C2, a capacitor C3 and a resistor R10, wherein 3 pins of the trigger U3 are connected with the motor drive circuit (7) through the resistor R10, 2 pins of the trigger U3 are respectively connected with the first operational circuit (4) and the second operational circuit (5), 4 pins and 8 pins of the trigger U3 are simultaneously connected with a power supply VCC, 5 pins of the trigger U3 are grounded through the capacitor C3, 1 pin of the trigger U3 is grounded, and two ends of the capacitor C1 and the capacitor C2 are respectively connected with 6 pins and 1 pin of the trigger U3.
5. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the first signal rectifying circuit (2) comprises a rectifier DO1, a thermistor RT1, a resistor R6, a resistor R11 and a capacitor C4, wherein a pin 1 of the rectifier DO1 is connected with the lead terminal A, a pin 3 of the rectifier DO1 is connected with the lead terminal B, a pin 2 of the rectifier DO1 is connected with the first arithmetic circuit (4) through the resistor R11, a pin 4 of the rectifier DO1 is grounded, two ends of the thermistor RT1 are respectively connected with a pin 1 and a pin 3 of the rectifier DO1, and two ends of the resistor R6 and two ends of the capacitor C4 are respectively connected with a pin 2 and a pin 4 of the rectifier DO 1.
6. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the second signal rectifying circuit (3) comprises a rectifier DO2, a thermistor RT2, a resistor R7, a resistor R12 and a capacitor C5, wherein a pin 1 of the rectifier DO2 is connected with the lead terminal C, a pin 3 of the rectifier DO2 is connected with the lead terminal O, a pin 2 of the rectifier DO2 is connected with the second arithmetic circuit (5) through the resistor R12, a pin 4 of the rectifier DO2 is grounded, two ends of the thermistor RT2 are respectively connected with a pin 1 and a pin 3 of the rectifier DO2, and two ends of the resistor R7 and two ends of the capacitor C5 are respectively connected with a pin 2 and a pin 4 of the rectifier DO 2.
7. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the motor driving circuit (7) comprises a triode Q6, a diode Q5 and a motor J, two ends of the motor J are respectively connected with a power supply VDD and a collector of a triode Q6, the diode Q5 is connected with the motor J in parallel, a base of the triode Q6 is connected with the trigger control circuit (6), and an emitter of the triode Q6 is grounded.
8. The automatic water supply control circuit for the fixed water level of the water tank according to claim 1, characterized in that: the lead terminal A corresponds to a lowest water level signal, the lead terminal B corresponds to a next-lower water level signal, and the lead terminal C corresponds to a higher water level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015456.XU CN209844871U (en) | 2019-07-02 | 2019-07-02 | Automatic water supply control circuit for water tank with fixed water level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015456.XU CN209844871U (en) | 2019-07-02 | 2019-07-02 | Automatic water supply control circuit for water tank with fixed water level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209844871U true CN209844871U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015456.XU Expired - Fee Related CN209844871U (en) | 2019-07-02 | 2019-07-02 | Automatic water supply control circuit for water tank with fixed water level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209844871U (en) |
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2019
- 2019-07-02 CN CN201921015456.XU patent/CN209844871U/en not_active Expired - Fee Related
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Granted publication date: 20191224 Termination date: 20210702 |